<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<div>

    <input type="text" v-model="num1">
    <input type="text" v-model="num2">
    <input type="button" value="加" @click="f('+')">
    <input type="button" value="减" @click="f('-')">
    <input type="button" value="乘" @click="f('*')">
    <input type="button" value="除" @click="f('/')">
    <h1>结果:{{result}}</h1>

</div>

<script src="js/vue.js"></script>

<script>
    let v = new Vue({
        el:"div",
        data:{
            num1:"",
            num2:"",
            result:"",
        },


        methods:{
            f(x){
                //eval()方法可以将字符串以代码的形式执行
                v.result = eval(v.num1+x+v.num2)
            }

        }

    })

</script>

</body>
</html>